Suitable for edge-folding and frame-pressing devices, bag-opening equipment, and bag-opening processes in bag-opening equipment.

Abstract

This invention relates to a folding and pressing device, a bag opening device, and a bag opening process suitable for bag opening equipment. It includes a movable frame, an X-axis folding unit, and a Y-axis folding unit. The X-axis folding unit includes an X-axis adjustment module and two folding forming modules adapted to the folding structure. The two folding forming modules are arranged opposite each other along the X-axis, and the X-axis adjustment module is drivenly connected to the folding forming modules, adjusting the distance between the two folding forming modules along the X-axis. The Y-axis folding unit includes a Y-axis adjustment module and two folding forming modules adapted to the folding structure, arranged opposite each other along the Y-axis, and the Y-axis adjustment module is drivenly connected to the folding forming modules, adjusting the distance between the two folding forming modules along the Y-axis. The four folding forming modules together form a central window adapted to bag openings of different sizes. This folding and pressing device can meet the bag opening requirements of different bag opening sizes, significantly improving versatility.

Description

Technical Field

[0001] This invention relates to the field of bag opening equipment technology, specifically to a folding and pressing device, bag opening equipment, and bag opening process suitable for bag opening equipment. Background Technology

[0002] A bag-opening device (also known as a bag-opening machine, bag-opening sewing machine, etc.) is a sewing machine specifically designed for sewing bags. It is mainly used for sewing pockets, zippers, and other parts in the clothing, bag, and other industries, and is widely used in the sewing industry.

[0003] Existing bag-opening equipment typically includes a cutting device, a sewing device, a hemming and pressing device, and a hemming device adapted to the hemming and pressing device. The cutting device is used to cut the fabric, the sewing device is used to sew the fabric, the hemming and pressing device is mainly used to tension and transfer the fabric, and the hemming device is used to form the bag opening on the fabric. The bag opening is usually a long strip structure, such as... Figure 3 As shown. In the prior art, the process of opening a bag on fabric using existing bag-opening equipment typically includes: Step 1, determining the area on the fabric where the bag opening needs to be sewn, such as... Figure 1 As shown, the size of the bag opening area is usually the same as the size of the bag opening; Step 2: Use a cutting device to cut a seam in the bag opening area to fit the required bag opening, and sew it on the four sides of the bag opening to form bag edge pieces, such as... Figure 2 As shown; Step 3: Insert the folding device into the bag opening area. Through the cooperation of the folding device and the folding frame device, each bag edge piece is folded to the inside of the bag opening to form a folded edge, and the desired bag opening shape is formed simultaneously, such as... Figure 3 As shown; Step 4: Sew the folded edge directly using a sewing device according to actual needs, or first place a bag lip, zipper, or fabric piece at the bag opening and then sew the folded edge using a sewing device to complete the bag opening.

[0004] Existing technologies disclose several bag-opening devices, such as a bag-opening machine for garment bag opening processing disclosed in Chinese patent application CN 111575926 A, a continuous production garment bag-opening machine disclosed in Chinese patent application CN 112430916 A, and a bag-opening machine and processing technology for secondary sewing of pockets disclosed in Chinese patent CN 113622101 B. These devices can complete the bag-opening work more conveniently and efficiently. However, the folding and pressing frame devices in existing bag-opening devices are only suitable for bag openings of fixed sizes. When the size of the bag opening changes, it is necessary to replace the folding and pressing frame device of the corresponding size and the folding device adapted to the folding and pressing frame device. This not only results in poor versatility of existing bag-opening devices, but also makes the existing bag-opening process more troublesome, less efficient, and more costly, which urgently needs to be solved. Summary of the Invention

[0005] The first aspect of this invention addresses the problem that existing bag-opening equipment can only be applied to bag openings of specific sizes. It provides a folding and pressing frame device that can automatically adjust according to the size of the bag opening. This not only meets the opening needs of bag openings of different sizes, significantly improving versatility, but also makes the bag-opening process simpler, more convenient, and more efficient. The main concept is as follows:

[0006] A folding and pressing device for bag opening equipment includes a movable frame, an X-axis folding unit, and a Y-axis folding unit. The X-axis folding unit is mounted on the movable frame and includes an X-axis adjustment module and two folding forming modules adapted to the folding structure. The two folding forming modules are arranged opposite each other along the X-direction, and the X-axis adjustment module is drivenly connected to the folding forming modules, adjusting the distance between the two folding forming modules along the X-direction. The Y-axis folding unit is also mounted on the movable frame and includes a Y-axis adjustment module and two folding forming modules adapted to the folding structure, arranged opposite each other along the Y-direction. The Y-axis adjustment module is drivenly connected to the folding forming modules, adjusting the distance between the two folding forming modules along the Y-direction. The four folding forming modules together form a central window adapted to bag openings of different sizes. In this solution, by configuring an X-direction folding unit, which includes an X-direction adjustment module and two folding forming modules, the two folding forming modules are arranged opposite each other along the X direction. The X-direction adjustment module is drively connected to the folding forming modules, allowing at least one folding forming module to move along the X direction. This enables the X-direction adjustment module to adjust the distance L between the two folding forming modules along the X direction, which corresponds to the length of the bag opening. This distance L can be adjusted by the X-direction adjustment module to accommodate bag openings of different lengths, meeting the opening requirements of bag openings of varying lengths. Similarly, by configuring a Y-direction folding unit, which includes a Y-direction adjustment module and two folding forming modules, the two folding forming modules are arranged opposite each other along the Y direction. The adjustment module is connected to the hem forming module via a drive, allowing at least one hem forming module to move along the Y direction using the Y-axis adjustment module. This allows the Y-axis adjustment module to adjust the distance W between the two hem forming modules along the Y direction, which corresponds to the width of the bag opening. This adjustable distance W can accommodate bag openings of different widths, meeting the opening requirements for various bag opening sizes. A central window for inserting the hem forming device is formed between the four hem forming modules. The size of this central window can be automatically adjusted according to the bag opening size, not only meeting the opening requirements of different bag opening sizes and significantly improving versatility, but also eliminating the need to replace parts or configure hem pressing devices of different sizes, making the bag opening process simpler, more convenient, and more efficient.

[0007] Furthermore, the X-axis adjustment module includes an X-axis adjustment power source and an X-axis moving mechanism. The X-axis adjustment power source is driven by the X-axis moving mechanism, which is driven by the hem forming module. The X-axis adjustment power source drives the two hem forming modules to move synchronously in opposite directions along the X-axis. By controlling the two hem forming modules to move synchronously in opposite directions along the X-axis, not only can the distance L between the two hem forming modules be quickly adjusted to accommodate bag openings of different lengths, but it also simplifies control and the hem forming process and improves fitting accuracy.

[0008] A second aspect of this invention addresses the problem of improving the efficiency and accuracy of X-direction adjustment. Preferably, the X-direction moving mechanism includes a synchronous gear and two symmetrically arranged transmission components. The two transmission components are movably mounted on a movable frame along the X-direction. Two edge-forming modules in the X-direction edge-forming unit are respectively connected to the two transmission components. Each of the two transmission components is equipped with a rack adapted to the synchronous gear, and the racks of the two transmission components mesh with the synchronous gear. The X-direction adjustment power is located on the movable frame and is connected to the synchronous gear. The X-direction adjustment power drives the two transmission components to move synchronously in opposite directions along the X-direction. This allows the two edge-forming modules to move synchronously in opposite directions, effectively improving adjustment efficiency and ensuring the operational accuracy of the two edge-forming modules, thus contributing to improved adjustment precision.

[0009] Furthermore, the Y-axis adjustment module includes a Y-axis adjustment power source and a Y-axis moving mechanism. The Y-axis adjustment power source is drive-connected to the Y-axis moving mechanism, which is drive-connected to the hem forming module. The Y-axis adjustment power source drives the two hem forming modules to move synchronously in opposite directions along the Y-axis. By controlling the two hem forming modules to move synchronously in opposite directions along the Y-axis, not only can the distance W between the two hem forming modules be quickly adjusted to accommodate bag openings of different widths, but it also simplifies control and the hem forming process and improves fitting accuracy.

[0010] A third aspect of this invention addresses the problem of improving the stability and reliability of Y-direction adjustment. Preferably, the Y-direction folding unit includes a Y-direction adjustment module. This module comprises two Y-direction moving mechanisms arranged parallel to each other along the Y-direction and positioned on opposite sides of the folding forming module. The two ends of the two folding forming modules in the Y-direction folding unit are connected to these mechanisms, allowing them to move synchronously in opposite directions. By configuring two Y-direction moving mechanisms and connecting the two ends of the two folding forming modules to them, not only can the two mechanisms support the ends of the folding forming modules, ensuring synchronous movement of both ends and guaranteeing the folding forming module moves strictly along the Y-direction, but the mechanisms also enable synchronous reverse movement of the two folding forming modules along the Y-direction, thereby effectively improving the stability and reliability of the folding forming module's movement.

[0011] Preferably, both Y-axis moving mechanisms employ belt drive mechanisms, each including a driving pulley, a driven pulley, and a drive belt. The two driving pulleys are connected to a drive shaft, and the Y-axis adjusting power is also connected to the drive shaft. The two driven pulleys are rotatably mounted on a movable frame. The drive belt is tensioned between the driving and driven pulleys. One hemming module has its two ends connected to the upper sides of the two drive belts, and the other hemming module has its two ends connected to the lower sides of the two drive belts. The Y-axis adjusting power simultaneously drives the two belt drive mechanisms via the drive shaft, improving their synchronization and thus enhancing the synchronization of the two hemming modules. Furthermore, by connecting one hemming module to the upper sides of the two drive belts and the other to the lower sides, the two hemming modules can move synchronously in opposite directions under the drive of the Y-axis adjusting power, improving efficiency and ensuring operational accuracy.

[0012] The fourth aspect of this invention addresses the problem of adapting to different bag opening sizes and fabric thicknesses. Further, the hem forming module includes a base, a pull-out mechanism, and a pressing mechanism. The pressing mechanism includes a pressing component and a pressing power connected to the base, with the pressing power drivingly connected to the pressing component. The pull-out mechanism includes a pull-out component and a pull-out power connected to the base, with the pull-out power drivingly connected to the pull-out component. The pull-out component is positioned above the pressing component and is used to adapt to the hem forming device. The pull-out power drives the pull-out component to move towards a corresponding hem forming module at position one, pressing the corresponding side of the bag edge against the hem forming device, causing the bag edge to bend. The pressing power drives the pressing component to press the bent bag edge tightly. The pull-out power also drives the pull-out component to move away from the corresponding hem forming module at position two, causing the pull-out component to exit the hem forming device. By configuring a pull-out mechanism in the hemming module, and configuring a pull-out power and a pull-out component connected to the pull-out power in the pull-out mechanism, the pull-out mechanism can cooperate with the hemming device to form a hemming process. This not only creates a brand-new hemming process, but also meets the hemming requirements of fabrics of different thicknesses and bag openings of different sizes. This ensures that fabrics of different thicknesses and bag openings of different sizes can achieve better hemming results and facilitates automated hemming.

[0013] Preferably, in the X-direction folding unit, the base of the folding forming module is connected to the X-direction adjustment module. The pull-out component in the folding forming module is movably mounted on the base along the X-direction. The pull-out power is a cylinder, with one end connected to the base and the other end connected to the pull-out component. The cylinder extends and retracts along the X-direction. The pressing component is hinged to the base, and the pressing power is also a cylinder, with one end connected to the base and the other end connected to one end of the pressing component. The cylinder extends and retracts along the Z-direction to drive the pressing component to rotate. This allows the bag edge piece to be clamped or released using the lever principle, making the X-direction folding unit more compact and smaller in size. It also allows for better adaptation to the folding device and forms a folding fit suitable for different lengths.

[0014] Preferably, in the Y-direction folding unit, the base of the folding forming module is connected to the Y-direction adjustment module. The pull-out component in the folding forming module is movably mounted on the base along the Y direction. The pull-out power is a cylinder, with one end connected to the base and the other end connected to the pull-out component. The cylinder extends and retracts along the Y direction. The pressing power is also a cylinder, with one end connected to the base and the other end connected to the pressing component. The cylinder extends and retracts along the Z direction to drive the pressing component to rise and fall along the Z direction. This not only makes the Y-direction folding unit more compact and smaller in size, but also allows for better adaptation to the folding device and enables it to form a folding fit suitable for different widths.

[0015] A bag-opening device includes the aforementioned folding and pressing device, a frame, and a folding device connected to the frame. The frame is provided with a worktable, and the folding and pressing device is positioned above the worktable. The folding and pressing device is configured to move along the X and Y directions. The folding device includes a folding mold, with folding structures provided on both sides of the folding mold along the X direction and on both sides of the folding mold along the Y direction. The folding structures are adapted to a folding forming module. The folding mold and / or the folding and pressing device are configured to be vertically movable along the Z direction. In this solution, a workbench is installed on the frame to facilitate bag opening operations, making the bag opening process more convenient. The hemming and pressing device is configured to move along the X-direction. This allows for adjustment of the device's position along the X-direction, enabling it to coordinate with various workstations on the frame. Furthermore, the distance between the hemming forming module and the corresponding hemming structure in the X-direction hemming unit can be adjusted, allowing the hemming structure on one side to engage with the hemming forming module on the other side. This allows for the hemming of both sides of the bag opening along the Y-direction in different lengths, solving the problem of hemming for bags of varying lengths. The problem of opening width is addressed by configuring the folding and pressing frame device to move along the Y direction, giving the folding forming module in the Y-direction folding unit the freedom to move relative to the folding mold along the Y direction. This allows the folding structure to work with the folding forming module in the Y-direction folding unit to complete the folding work on both sides of the bag opening along the X direction for different widths, thus solving the problem of being suitable for bag openings of different widths. Furthermore, by configuring the folding mold and / or the folding and pressing frame device to be able to move up and down along the Z direction, the folding mold and the folding and pressing frame device can move relative to each other along the Z direction. This allows the folding mold to be inserted into the folding and pressing frame device to form a folding engagement with the folding forming module, or to be removed from the folding forming module after the folding is completed, which is very convenient and efficient.

[0016] The fifth aspect of this invention addresses the problem of achieving better folding effects for bag openings of different sizes. Furthermore, the folding device also includes a telescopic power source, and the folding mold is configured to extend and retract along the X direction. The telescopic power source is connected to the folding mold via a transmission, and the telescopic power source adjusts the length of the folding mold by driving the folding mold to extend and retract along the X direction. By configuring the folding mold to be telescopic along the X direction, and allowing the telescopic force to adjust the length of the folding mold by driving its telescopic movement along the X direction, the following advantages are achieved: First, the length of the folding mold can be adapted to bag openings of different lengths. This allows the folding structures on both sides of the folding mold along the Y direction to better cooperate with the folding forming module in the X-direction folding unit. This not only meets the folding requirements of the two wide sides of bag openings of different sizes but also simplifies the folding process and ensures a good folding effect. Second, the length of the folding structures on both sides of the folding mold along the X direction can be adapted to bag openings of different lengths. This allows the folding structures on both sides of the folding mold along the X direction to better cooperate with the folding forming module in the Y-direction folding unit. This not only meets the folding requirements of the two long sides of bag openings of different sizes but also simplifies the folding process and ensures a good folding effect.

[0017] To address the issue of the extendable nature of the hemming mold, preferably, the hemming mold includes a support, two end components, and several intermediate components. The support is connected to the frame. The two end components are arranged opposite each other, forming a sliding pair along the X-direction with the support. The end faces and both sides of the end components are respectively equipped with the hemming structure. The intermediate components are movably positioned between the two end components along the X-direction, with the hemming structure constructed on both sides. An elastic component is provided between at least two adjacent intermediate components. The elastic component has elasticity, and the extension / retraction power is transmitted to the end components via a linkage mechanism. The power component drives the two end components to move synchronously in opposite directions along the X-direction. When the two end components approach each other, the elastic potential energy of the elastic component increases; when the end components move away from each other, the elastic potential energy of the elastic component decreases. The elastic component drives the intermediate components to move synchronously with the end components. This not only allows the length of the hemming mold and the side hemming structure to be adjusted by the extension / retraction power to meet the hemming requirements of bag openings of different sizes, but also allows for smaller gaps between adjacent hemming structures. Each intermediate component can be automatically and evenly distributed between the two end components, thus facilitating a better hemming effect through the combination of various hemming structures.

[0018] Preferably, the folding structure includes a positioning surface and a hook protruding from the positioning surface. The hook has a limiting surface for restricting the bag edge piece, and the positioning surface and the limiting surface form a hook shape, so as to form a folding engagement with the folding forming module.

[0019] A bag opening process, using the aforementioned bag opening equipment, includes: an automatic adjustment process, a cutting process, and a wide-edge folding process. The automatic adjustment process includes: adjusting the spacing between two folding modules in the X-direction folding unit according to the required bag opening length, so that the spacing between the two folding modules adapts to the bag opening length; adjusting the spacing between two folding modules in the Y-direction folding unit according to the required bag opening width, so that the spacing between the two folding modules adapts to the bag opening width; and adjusting the length of the folding die in the folding device according to the required bag opening length, so that the length of the folding die is less than the bag opening length. The cutting process includes: constraining the fabric to the folding frame device and cutting seams of the required shape on the fabric. The wide-edge folding process includes: driving the folding device and the folding module to move relative to each other along the Z-direction. The process involves moving the folding die so that its lower end is inserted into the fabric, with the folding structure's positioning surface corresponding to the fabric and its limiting surface located below the fabric. Based on the bag opening's length, the folding die is extended using telescopic power, adapting its length to the bag opening's length. During this extension, the folding structure causes the corresponding side of the bag edge to bend. The pulling force in the X-axis folding unit drives the pulling component to move towards the folding device at position one, pressing the bag edge into the folding structure, thus forming a bend. The pressing force in the X-axis folding unit then drives the pressing component to press the bent bag edge. Finally, the pulling force in the X-axis folding unit drives the pulling component to move away from the folding device to position two, causing the pulling component to exit the folding structure, completing the folding of the two wide sides of the bag opening. This solves the problem of folding the two wide sides of bag openings of different lengths.

[0020] To address the issue of folding the two long sides of bag openings of different widths, a further step is included: a long side folding process. This process involves adjusting the relative positions of the folding frame device and the folding device along the Y direction, so that the folding forming module in the Y-direction folding unit successively engages with the folding structure on the corresponding side of the folding mold to complete the folding of the two long sides of the bag opening.

[0021] Preferably, the long side folding process includes: according to the width of the bag opening, driving the folding pressing frame device to move relative to the folding mold along the Y direction, so that the folding forming module on the Y-direction folding unit side approaches the folding structure on the corresponding side folding device side and stops at a position adapted to the folding structure; using the pulling force in the side folding forming module to drive the pulling component to move towards the folding device to position one, and pressing the bag edge piece into the folding structure, so that the bag edge piece forms a bend; using the pressing force in the folding forming module to drive the pressing component to press the bended bag edge piece; using the pulling force in the folding forming module to drive the pulling component to move away from the folding device to position two, so that the pulling component exits the folding structure, completing the first step of the bag opening folding. The folding process of the long side: Based on the width of the bag opening, the folding and pressing frame device is driven to move in the opposite direction along the Y direction, so that the folding forming module on the other side of the folding and pressing frame device approaches the folding structure on the corresponding side of the folding device and stops at a position that matches the folding structure; the pulling force in the side folding forming module drives the pulling component to move towards the folding device to position one, and presses the bag edge piece into the folding structure, so that the bag edge piece is bent; the pressing force in the folding forming module drives the pressing component to press the bent bag edge piece tightly; the pulling force in the folding forming module drives the pulling component to move away from the folding device to position two, so that the pulling component exits the folding structure, completing the folding process of the other long side of the bag opening.

[0022] To address the issue of adapting to fabrics of varying thicknesses, the wide-side folding process further includes: driving the folding device to move upwards along the Z-direction relative to the folding frame device, and using the limiting surface of the folding device to press the bent pocket edge against the lower surface of the pull-out component; the long-side folding process further includes: driving the folding device to move upwards along the Z-direction relative to the folding forming module, and using the limiting surface of the folding device to press the bent pocket edge against the lower surface of the pull-out component. This not only achieves a better folding effect but also makes it suitable for fabrics of different thicknesses, eliminating the adverse effects of fabric thickness on the folding effect.

[0023] Compared with the prior art, the folding and pressing device, bag opening equipment and bag opening process provided by the present invention can automatically adjust the spacing between the two folding modules according to the size of the bag opening. It can not only meet the bag opening needs of different bag opening sizes and significantly improve versatility, but also make the bag opening process simpler, more convenient and more efficient. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a partial top view of the fabric.

[0026] Figure 2 The fabric after laser cutting.

[0027] Figure 3 The fabric after the edge piece of the bag is folded inside to form the bag opening.

[0028] Figure 4 This is a schematic diagram of the structure of an X-direction folding unit in a folding and pressing frame device provided in Embodiment 1.

[0029] Figure 5 for Figure 4 A partial schematic diagram of the X-axis adjustment power point.

[0030] Figure 6 for Figure 4 A partial schematic diagram of the module where the folded edge is formed.

[0031] Figure 7 for Figure 4 Top view.

[0032] Figure 8 for Figure 7 Sectional view at point AA.

[0033] Figure 9 for Figure 7 Sectional view at point BB.

[0034] Figure 10 This is one of the structural schematic diagrams of a Y-direction folding unit in a folding and pressing frame device provided in Embodiment 1.

[0035] Figure 11 This is the second schematic diagram of the structure of a Y-direction folding unit in the folding and pressing frame device provided in Embodiment 1.

[0036] Figure 12 for Figure 11 Sectional view at point CC.

[0037] Figure 13 This is a schematic diagram of the folding and pressing frame device provided in Example 1.

[0038] Figure 14 for Figure 13 A top view, the movable frame is not shown.

[0039] Figure 15 This is a schematic diagram of a pressing mechanism provided in Example 2.

[0040] Figure 16 This is a schematic diagram of the structure of a folding and pressing frame device provided in Embodiment 2.

[0041] Figure 17 This is a front view of a folding device in a bag-opening device provided in Embodiment 3.

[0042] Figure 18 for Figure 17 A partial right view.

[0043] Figure 19 This is one of the partial structural schematic diagrams of a bag-opening device provided in Example 3.

[0044] Figure 20 This is the second partial structural schematic diagram of a bag-opening device provided in Example 3.

[0045] Figure 21 This is the third partial structural schematic diagram of a bag-opening device provided in Example 3.

[0046] Figure 22 This is a schematic diagram showing the folding device aligned with the bag opening area during the bag opening process.

[0047] Figure 23 This is a schematic diagram showing the lower end of the folding device inserted into the bag opening area during the bag opening process.

[0048] Figure 24 This is a schematic diagram showing the folding and pressing device moving along the X direction during the bag opening process, so that the folding forming module on the X-direction folding unit side approaches the folding device end of the folding structure.

[0049] Figure 25 This is a diagram illustrating the process of opening the bag, where the pull plate extends and the bag side panel rests against the positioning surface.

[0050] Figure 26 This is a schematic diagram showing the folding device moving upwards and pressing the bag edge piece during the bag opening process.

[0051] Figure 27 This is a schematic diagram showing the upper pressing component clamping the bag edge piece during the bag opening process.

[0052] Figure 28 This is a schematic diagram showing the pull-out component moving in the opposite direction and exiting the folding device during the bag opening process.

[0053] Figure 29This is a schematic diagram showing the folding device moving downwards and detaching from the bag edge piece during the bag opening process.

[0054] Figure 30 This is a schematic diagram showing the process of moving the folding and pressing frame device along the X direction during the bag opening process, so that the folding forming module on the other side of the folding unit in the X direction approaches the folding structure at the other end of the folding device.

[0055] Figure 31 This is a diagram showing the two wide sides of the bag opening after folding during the opening process.

[0056] Figure 32 This is a three-dimensional structural diagram of a folding device in a bag-opening device provided in Example 4.

[0057] Figure 33 for Figure 32 The right view.

[0058] Figure 34 This is a front view of an intermediate component in a bag-opening device provided in Embodiment 4.

[0059] Figure 35 for Figure 32 The front view shows the minimum length of the folding mold.

[0060] Figure 36 for Figure 32 The front view shows an increase in the length of the folding die.

[0061] Figure 37 This is a partial structural schematic diagram of a bag-opening device provided in Example 4.

[0062] Figure 38 This is a schematic diagram showing the folding device aligned with the bag opening area during the bag opening process.

[0063] Figure 39 This is a schematic diagram showing the lower end of the folding device inserted into the bag opening area during the bag opening process.

[0064] Figure 40 This is a schematic diagram showing the adjustment of the folding device length to fit the bag opening length during the bag opening process.

[0065] Figure 41 This is a diagram illustrating the process of opening the bag, where the pull plate extends and the bag side panel rests against the positioning surface.

[0066] Figure 42 This is a schematic diagram showing the folding device moving upwards and pressing the bag edge piece during the bag opening process.

[0067] Figure 43 This is a schematic diagram showing the upper pressing component clamping the bag edge piece during the bag opening process.

[0068] Figure 44 This is a schematic diagram showing the pull-out component moving in the opposite direction and exiting the folding device during the bag opening process.

[0069] Figure 45 This is a schematic diagram showing the process of opening a bag after the folding is completed, and the length of the folding device is adjusted to be smaller than the length of the bag opening.

[0070] Explanation of markings in the diagram: Fabric 1, Bag opening 11, Bag opening area 12, Seal 13, Bag edge piece 14, Long side 15, Wide side 16; Folding and pressing frame device 2, Movable frame 21, X-direction folding unit 22, X-direction adjustment power 221, X-direction moving mechanism 222, Y-direction folding unit 23, Y-direction adjustment power 231, Y-direction moving mechanism 232, Folding forming module 24, Linear guide rail 25, Center window 26; Base 3, Guide groove 31, Guide hole 32, Pull-out power 33, Pull-out component 34, Pressing power 35, Pressing component 36, Guide rod 37, Pull rod 38, Hinge shaft 39; Synchronous gear 41, Transmission component 42, Rack 43; Transmission structure 51, Transmission shaft 52, Bearing seat 53, Driving pulley 54, Driven pulley 55, Transmission belt 56; Downward pressing Mechanism 6, lower pressure plate 61, center insertion port 62, threaded hole 63, movable pressure plate 64, strip hole 65, fastener 66, lower pressure power 67; Frame 7, worktable 71, connecting frame 72, first frame 721, second frame 722, X-direction power 73, X-direction transmission mechanism 74, Y-direction power 75, Y-direction transmission mechanism 76, Z-direction power 77, Z-direction transmission mechanism 78; Folding device 8, bracket 81, folding mold 82, folding structure 83, positioning surface 831, hook 832, limiting surface 833, lifting power 84, lifting transmission mechanism 85; Telescopic power 9, belt drive mechanism 91, end component 92, guide shaft 93, intermediate component 94, mating hole 95, elastic component 96, rotating shaft 97, intermediate shaft section 971, lead screw section 972, nut 973. Detailed Implementation

[0071] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0072] Example 1

[0073] This embodiment provides a folding and pressing device suitable for bag opening equipment, including a movable frame 21, an X-direction folding unit 22, and a Y-direction folding unit 23. The movable frame 21 can adopt an existing structure, and this embodiment does not limit the structure of the movable frame 21. For ease of description, in this embodiment, the two mutually perpendicular horizontal directions of the movable frame 21 can be referred to as the X-direction and the Y-direction, and the thickness direction of the movable frame 21 can be referred to as the Z-direction. Figure 13 and Figure 14 As shown, the X direction can be taken as the horizontal direction.

[0074] like Figure 1 and Figure 7 As shown, the X-direction folding unit 22 is disposed on the movable frame 21. In this embodiment, the X-direction folding unit 22 includes an X-direction adjustment module and two folding forming modules 24 that adapt to the folding structure 83 in the folding device 8. The two folding forming modules 24 are arranged opposite to each other along the X direction, such that there is a first gap between the two folding forming modules 24. This first gap is used to adapt to the length of the bag opening 11. At the same time, in this embodiment, the X-direction adjustment module is connected to the folding forming module 24 by transmission, so that at least one folding forming module 24 can be driven to move along the X direction by the X-direction adjustment module. Thus, the first gap L between the two folding forming modules 24 along the X direction can be adjusted by the X-direction adjustment module. This first gap L corresponds to the length of the bag opening 11. The first gap L can be adjusted by the X-direction adjustment module, so that it can automatically adapt to bag openings 11 of different lengths and meet the opening requirements of bag openings 11 of different lengths.

[0075] like Figure 10 and Figure 11 As shown, the Y-direction folding unit 23 is also disposed on the movable frame 21. In this embodiment, the Y-direction folding unit 23 includes a Y-direction adjustment module and two folding forming modules 24 that adapt to the folding structure 83 in the folding device 8. The two folding forming modules 24 are arranged opposite each other along the Y direction, so that there is a second gap between the two folding forming modules 24. The second gap is used to adapt to the width of the bag opening 11. At the same time, in this embodiment, the Y-direction adjustment module is connected to the folding forming module 24 by transmission, so that at least one folding forming module 24 can be driven to move along the Y direction by the Y-direction adjustment module. Thus, the second gap W between the two folding forming modules 24 along the Y direction can be adjusted by the Y-direction adjustment module. The second gap W corresponds to the width of the bag opening 11. The second gap W can be adjusted by the Y-direction adjustment module, so that it can adapt to bag openings 11 of different widths and meet the opening requirements of bag openings 11 of different widths.

[0076] In this embodiment, four folding edge forming modules 24 are used to form a central window 26 for the folding edge device 8 to be inserted, as shown below. Figure 13 and Figure 14As shown, this folding and pressing device 2 can automatically adjust the spacing between the two folding forming modules 24 according to the size of the bag opening 11, thereby meeting the opening requirements of bag openings 11 of different sizes and significantly improving versatility.

[0077] In this embodiment, the folding forming module 24 includes a base 3, a pull-out mechanism, and an upper pressing mechanism. The base 3 primarily serves a load-bearing function. The upper pressing mechanism includes an upper pressing component 36 and an upper pressing power source 35 connected to the base 3. The upper pressing power source 35 is drively connected to the upper pressing component 36 so that the upper pressing power source 35 drives the upper pressing component 36 to press the folded bag edge piece 14 upwards. In implementation, the upper pressing component 36 can be made of sheet metal, such as a flat plate or a bent plate with folds. Figure 8 or Figure 12 As shown. The pull-out mechanism includes a pull-out component 34 and a pull-out power 33 connected to the base 3. The pull-out power 33 is drively connected to the pull-out component 34. The pull-out component 34 can be arranged along the X or Y direction so as to move along the X or Y direction under the drive of the pull-out power 33. During assembly, at least a portion of the pull-out component 34 is positioned above the upper pressing component 36 to cooperate with the upper lower pressing mechanism 6. In implementation, the pull-out component 34 is configured to fit the folding device 8. The pull-out component 34 can be made of sheet metal, which can be a flat plate or a bent plate with folds, such as... Figure 8 or Figure 12 As shown. During the bag opening process, the pull-out force 33 drives the pull-out component 34 to move towards the corresponding other set of folding edge forming modules 24 to position one, so as to form a folding fit with the folding edge structure 83 on the side of the folding edge device 8 at position one, and press the corresponding side bag edge piece 14 against the folding edge device 8, so that the bag edge piece 14 is bent, as shown. Figure 25 As shown; then, the upward pressing force 35 can drive the upward pressing component 36 to press the bent bag edge piece 14 tightly, as shown. Figure 31As shown, this allows for subsequent sewing or other operations. Furthermore, the pulling force 33 also drives the pulling component 34 to move to position two in a direction away from the corresponding folding edge forming module 24. During this process, the pulling component 34 gradually moves away from the corresponding folding edge structure 83, allowing it to gradually exit the folding edge device 8. At position two, the pulling component 34 has completely exited the folding edge structure 83 of the folding edge device 8, facilitating subsequent sewing along the edge of the bag opening 11. In this embodiment, by configuring a pulling mechanism in the folding edge forming module 24, and configuring a pulling force 33 and a pulling component 34 connected to the pulling force 33 in the pulling mechanism, the pulling mechanism can cooperate with the folding edge device 8 to form a folding edge. This not only creates a new folding edge process but also meets the folding edge requirements of fabrics 1 of different thicknesses and bag openings 11 of different sizes, ensuring better folding edge effects for fabrics 1 of different thicknesses and bag openings 11 of different sizes, and facilitating automated folding. In practice, the folding forming module 24 in the X-direction folding unit 22 can be the same as or different from the folding forming module 24 in the Y-direction folding unit 23.

[0078] For the X-direction folding unit 22, in implementation, each of the two folding forming modules 24 can be configured with an X-direction adjustment module, or one X-direction adjustment module can be used to drive both folding forming modules 24 simultaneously. In implementation, such as Figures 4-9 As shown, the X-axis adjustment module may include an X-axis adjustment power source 221 and an X-axis moving mechanism 222. The X-axis adjustment power source 221 is drivenly connected to the X-axis moving mechanism 222, and the X-axis moving mechanism 222 is drivenly connected to the folding forming module 24. The X-axis adjustment power source 221 may be a stepper motor or a servo motor, etc. The X-axis moving mechanism 222 is arranged along the X-axis and may be a belt drive mechanism 91, a gear-rack drive mechanism, or a lead screw-nut drive mechanism, etc. In one embodiment, the two folding forming modules 24 may be connected to the movable frame 21 respectively via linear guide rails 25, so that the folding... The forming module 24 has a degree of freedom to move along the X direction. Simultaneously, each of the two hemming forming modules 24 is equipped with an X-direction adjustment module. The X-direction adjustment module employs a screw-nut transmission mechanism. In this mechanism, the screw is rotatably mounted on the movable frame 21 and arranged along the X direction. The nut 973 in the screw-nut transmission mechanism is threadedly connected to the screw and fixedly connected to the base 3 of the hemming forming module 24. The X-direction adjustment power 221 is connected to the screw drive, driving the screw to rotate and thus causing the hemming forming module 24 to move linearly along the X direction, thereby achieving the purpose of adjusting the first distance between the two hemming forming modules 24. It is understood that the X-direction adjustment module also has a design to prevent the nut from rotating with the screw; this is existing technology and will not be elaborated upon here.

[0079] In another preferred embodiment provided in this example, the two hemming modules 24 can be driven to move synchronously in opposite directions along the X direction by the X-direction adjustment power 221. This not only allows for rapid adjustment of the first distance L between the two hemming modules 24 to accommodate bag openings 11 of different lengths, but also simplifies control and the hemming process and improves fitting accuracy. In practice, when each of the two hemming modules 24 is equipped with an independent X-direction adjustment module, the two sets of X-direction adjustment modules can be electrically connected to the control module to control the synchronous reverse movement of the two X-direction adjustment modules. When the two hemming modules 24 share a single X-direction adjustment module, the X-direction adjustment power 221 can be used to automatically control the synchronous reverse movement of the two hemming modules 24. For example, in this case... Figures 4-9 As shown, the X-direction moving mechanism 222 includes a synchronous gear 41 and two symmetrically arranged transmission components 42. The transmission components 42 can preferably be constructed as L-shaped structures. The two transmission components 42 are respectively connected to the movable frame 21 via linear guide rails 25 arranged along the X direction, giving the transmission components 42 a degree of freedom to move along the X direction. The two folding forming modules 24 in the X-direction folding unit 22 are respectively connected to the two transmission components 42, as shown... Figures 4-9 As shown, each of the two transmission components 42 is equipped with a rack 43 that is adapted to the synchronous gear 41. The racks 43 of the two transmission components 42 mesh with the synchronous gear 41, and the synchronous gear 41 is located between the two racks 43. The X-axis adjustment power 221 can be fixedly mounted on the movable frame 21 and connected to the synchronous gear 41 for transmission. As shown in the figure, the rotation center of the synchronous gear 41 can be along the Z-axis, so that the two transmission components 42 can be driven to move synchronously in opposite directions along the X-axis at the same time by the X-axis adjustment power 221. This can not only effectively improve the adjustment efficiency, but also ensure the action accuracy of the two folding forming modules 24, which is beneficial to improving the adjustment accuracy.

[0080] As an example, in the X-axis folding unit 22, the pulling force 33 can preferably be a cylinder, such as... Figure 6 and Figure 8 As shown, one end of the cylinder can be connected to the base 3, and the other end is connected to the pull-out component 34. The cylinder is arranged along the X direction, allowing it to extend and retract in the X direction. The position of the pull-out component 34 along the X direction is adjusted by the extension and retraction of the cylinder. To improve the accuracy of the pull-out component 34's movement and to make the structure more compact and smaller, the base 3 is constructed with a guide groove 31 along the X direction, such as... Figure 6 As shown, the side of the pull-out component 34 is movably constrained by the guide groove 31 so as to guide the pull-out component 34 using the guide groove 31. In addition, the pull-out power 33 can also be an electric actuator or a hydraulic cylinder, etc.

[0081] For example, the upper pressing component 36 can be hinged to the base 3, such as Figure 8 As shown, this allows the pressing component 36 to rotate about the hinge axis 39; the pressing power 35 can also preferably be a cylinder, with one end connected to the base 3 and the other end connected to the pull rod 38. One end of the pull rod 38 is limited and constrained by one end of the pressing component 36, as shown. Figure 8 As shown, the cylinder extends and retracts along the Z-direction to drive the upper pressing component 36 to rotate, thereby clamping or releasing the bag edge piece 14 using the lever principle. This not only makes the structure of the X-direction folding unit 22 more compact and smaller in size, but also better adapts to the folding device 8, forming a folding fit suitable for different lengths. Furthermore, in implementation, the pulling force 33 can also be an electric actuator or a hydraulic cylinder. In the X-direction folding unit 22, the distance between the two pulling components 34 at position two can be used as the first distance L along the X-direction between the two folding forming modules 24. Alternatively, the distance between the two upper pressing components 36 can also be used as the first distance L along the X-direction between the two folding forming modules 24.

[0082] To ensure that the two folding forming modules 24 in the X-direction folding unit 22 can move strictly along the X-direction, in practice, the base 3 can also be connected to the movable frame 21 via a linear guide rail 25. For example, ... Figures 6-8 As shown, the base 3 is connected to a guide rod 37 arranged in the X direction, and the movable frame 21 is provided with a guide hole 32 arranged in the X direction. The guide rod 37 and the guide hole 32 form a sliding pair in the X direction so as to guide the movement of the base 3 in the X direction through the cooperation of the guide rod 37 and the guide hole 32.

[0083] Similarly, for the Y-direction folding unit 23, in implementation, a Y-direction adjustment module can be configured for each of the two folding forming modules 24, or a single Y-direction adjustment module can be used to drive both folding forming modules 24 simultaneously. For example... Figures 10-12As shown, in implementation, the Y-axis adjustment module may include a Y-axis adjustment power 231 and a Y-axis moving mechanism 232. The Y-axis adjustment power 231 is drivenly connected to the Y-axis moving mechanism 232, and the Y-axis moving mechanism 232 is drivenly connected to the hemming forming module 24. The Y-axis adjustment power 231 may be a stepper motor or a servo motor, etc. The Y-axis moving mechanism 232 is arranged along the Y direction and may be a belt drive mechanism 91, a gear-rack drive mechanism, or a screw-nut drive mechanism, etc. In one embodiment, the two hemming forming modules 24 may be connected to the movable frame 21 respectively via linear guide rails 25, so that... The hem forming module 24 has a degree of freedom to move along the Y direction. Simultaneously, each of the two hem forming modules 24 is equipped with a Y-direction adjustment module. The Y-direction adjustment module employs a screw-nut transmission mechanism. In this mechanism, the screw is rotatably mounted on the movable frame 21 and arranged along the Y direction. The nut 973 in the screw-nut transmission mechanism is threadedly connected to the screw and fixedly connected to the base 3 of the hem forming module 24. The Y-direction adjustment power 231 is connected to the screw drive, driving the screw to rotate and thus causing the hem forming module 24 to move linearly along the Y direction, thereby achieving the purpose of adjusting the second distance between the two hem forming modules 24. It is understood that the Y-direction adjustment module also has a design to prevent the nut from rotating with the screw; this is existing technology and will not be elaborated upon here.

[0084] In another preferred embodiment provided in this example, the two hemming modules 24 can be driven to move synchronously in opposite directions along the Y direction by the Y-direction adjustment power 231. This not only allows for rapid adjustment of the second distance W between the two hemming modules 24 to accommodate bag openings 11 of different widths, but also simplifies control and the hemming process and improves fitting accuracy. In practice, when each of the two hemming modules 24 is equipped with an independent Y-direction adjustment module, the two sets of Y-direction adjustment modules can be electrically connected to the control module so that the control module can control the synchronous reverse movement of the two Y-direction adjustment modules. When the two hemming modules 24 share a single Y-direction adjustment module, the Y-direction adjustment power 231 can be used to automatically control the synchronous reverse movement of the two hemming modules 24. For example, in this case... Figures 10-12 As shown, the Y-axis adjustment module includes two Y-axis moving mechanisms 232, which are arranged parallel to each other along the Y-axis. The two Y-axis moving mechanisms 232 are respectively arranged on both sides of the folding forming module 24. The two ends of the two folding forming modules 24 in the Y-axis folding unit 23 are respectively connected to the two Y-axis moving mechanisms 232, as shown. Figures 10-11As shown, this not only allows the two ends of the hemming module 24 to be supported by two Y-axis moving mechanisms 232 respectively, so that the two ends of the hemming module 24 can move synchronously through the two Y-axis moving mechanisms 232, ensuring that the hemming module 24 moves strictly along the Y direction, but also allows the two hemming modules 24 to move synchronously in opposite directions along the Y direction through the Y-axis moving mechanisms 232, thereby effectively improving the stability and reliability of the movement of the hemming module 24. More specifically, as an example, in this embodiment, both Y-axis moving mechanisms 232 are belt drive mechanisms 91, such as... Figure 11 As shown, the belt drive mechanism 91 includes a driving pulley 54, a driven pulley 55, and a drive belt 56. The two driving pulleys 54 are respectively connected to the drive shaft 52 for transmission. For example, as shown... Figure 11 As shown, two driving pulleys 54 can be symmetrically arranged at both ends of the drive shaft 52. The drive shaft 52 is connected to the movable frame 21 through bearing seats 53. Two driven pulleys 55 are rotatably mounted on the movable frame 21. The drive belt 56 is tensioned between the driving pulleys 54 and the driven pulleys 55. One of the folded edge forming modules 24 has its two ends connected to the upper sides of the two drive belts 56, as shown. Figure 11 and Figure 13 As shown, the two ends of another hemming module 24 are respectively connected to the lower sides of the two transmission belts 56; the Y-axis adjustment power 231 can be directly connected to the transmission shaft 52, or it can be connected to the transmission shaft 52 through a transmission structure 51 such as a belt transmission structure 51 or a gear transmission structure 51. In use, the Y-axis adjustment power 231 drives the transmission shaft 52 to simultaneously connect the two belt transmission mechanisms 91, which can improve the synchronization of the two belt transmission mechanisms 91, thereby improving the synchronization of the two hemming modules 24. At the same time, by connecting the two ends of one hemming module 24 to the upper sides of the two transmission belts 56, and the two ends of the other hemming module 24 to the lower sides of the two transmission belts 56, the two hemming modules 24 can move synchronously in opposite directions under the drive of the Y-axis adjustment power 231, improving efficiency and ensuring action accuracy.

[0085] As an example, in the Y-direction folding unit 23, the pulling force 33 can preferably be a cylinder, such as... Figures 10-12 As shown, one end of the cylinder can be connected to the base 3, and the other end is connected to the pull-out component 34. The cylinder is arranged along the Y direction, allowing it to extend and retract along the Y direction. The position of the pull-out component 34 along the Y direction is adjusted by extending and retracting the cylinder. To improve the accuracy of the pull-out component 34's movement and to make the structure more compact and smaller, the base 3 is constructed with a guide groove 31 along the Y direction, such as... Figure 10As shown, the side of the pull-out component 34 is movably constrained by the guide groove 31 so that the pull-out component 34 can be guided by the guide groove 31. Furthermore, in implementation, the pull-out power 33 can also be an electric actuator or a hydraulic cylinder, etc., which will not be described in detail here. As an example, the pressing power 35 can also preferably be a cylinder, with one end connected to the base 3 and the other end connected to the pressing component 36. The cylinder extends and retracts in the Z direction so that the pressing component 36 can be driven to rise and fall in the Z direction. When the pressing component 36 is in its lowest position, it does not affect the folding action above; when the pressing component 36 rises, it can press the bent bag edge piece 14 tightly against the pull-out component 34 and / or the pressing mechanism 6. To ensure the strict vertical lifting and lowering of the pressing component 36, in implementation, a guide hole 32 constructed in the base 3 and a guide rod 37 adapted to the guide hole 32 are also included, such as... Figure 10 and Figure 12 As shown, the guide rod 37 is vertically arranged, with its lower end connected to the upper pressing component 36 and its upper end connected to the movable end of the upper pressing power 35. The base 3 is fitted onto the guide rod 37 through the guide hole 32, so that the vertical movement of the upper pressing component 36 is guided by the cooperation between the guide rod 37 and the guide hole 32. Furthermore, in implementation, the pulling power 33 can also be an electric actuator or a hydraulic cylinder. In the Y-direction folding unit 23, the distance between the two pulling components 34 at position two can be used as the second distance W between the two folding forming modules 24 along the Y direction. Alternatively, the distance between the two upper pressing components 36 can be used as the first distance W between the two folding forming modules 24 along the Y direction.

[0086] It is understood that in some other embodiments, the folding forming module 24 in the Y-direction folding unit 23 can be applied to the X-direction folding unit 22, and similarly, the folding forming module 24 in the X-direction folding unit 22 can be applied to the Y-direction folding unit 23. Examples will not be provided here. In implementation, such as... Figure 13 and Figure 14 As shown, the folding forming module 24 in the X-direction folding unit 22 is preferentially arranged between the two folding forming modules 24 in the Y-direction folding unit 23, making the layout more reasonable and the action coordination more efficient.

[0087] In practical use, this device can automatically adjust the first spacing between the two hemming modules 24 in the X-direction hemming unit 22 and the second spacing between the two hemming modules 24 in the Y-direction hemming unit 23 according to the size of the bag opening 11, so as to automatically adapt to bag openings 11 of different sizes. Typically, the spacing between the two hemming modules 24 can be adjusted to be larger than the size of the bag opening 11, that is, the spacing between the two hemming modules 24 can be equal to the size of the bag opening 11 plus a margin. The size of the margin can be determined according to actual needs, and can be 1mm, 2mm, 3mm, etc., to achieve better hemming effects for fabrics 11 of different thicknesses. For example, when the width of the bag opening 11 is 10mm, the spacing between the two pull-out parts 34 in the two hemming modules 24 of the Y-direction hemming unit 23 can be automatically adjusted to fit 10mm, such as 11mm, 12mm, 13mm, etc. When the length of the bag opening 11 is 150mm, the distance between the two pull-out parts 34 in the two folding forming modules 24 in the X-direction folding unit 22 can be automatically adjusted to fit 150mm, such as 151mm, 152mm, 153mm, etc., which makes it easier for the folding forming module 24 and the folding device 8 to form a folding fit.

[0088] Example 2

[0089] The main difference between this embodiment 2 and the above embodiment 1 is that the folding and pressing frame device 2 provided in this embodiment is also equipped with a pressing mechanism 6 for constraining the fabric 1. The pressing mechanism 6 can cooperate with the folding forming module 24 to constrain and fix the fabric 1.

[0090] In implementation, the pressing mechanism 6 can be implemented using existing structures. However, in this embodiment, the pressing mechanism 6 includes a pressing plate 61 and a pressing power 67. The pressing plate 61 is Z-movably mounted on the movable frame 21. For example, the pressing plate 61 can be connected to the movable frame 21 via a linear guide 25 arranged along the Z-direction. The pressing plate 61 is configured with a central insertion port 62 for the folding device 8 to pass through. Figure 15 and Figure 16 As shown, in implementation, the central insertion port 62 can preferably be rectangular to fit the bag opening area 12; the downward pressing force 67 is located on the movable frame 21 and is connected to the downward pressing plate 61 for driving the downward pressing plate 61 to rise and fall in the Z direction. During assembly, the pull-out component 34 can be located between the downward pressing mechanism 6 and the upward pressing component 36, so that the fabric 1 can be clamped by the cooperation of the downward pressing mechanism 6 and the pull-out component 34, thus solving the constraint problem of the fabric 1. In implementation, the downward pressing force 67 can preferably be a cylinder, but an electric actuator or hydraulic cylinder can also be used.

[0091] In a further embodiment, the pressing mechanism 6 also includes four movable pressure plates 64, each of which can be fixed to one side of the central insertion port 62 by fasteners 66, such as... Figure 15 As shown, the four movable pressure plates 64 can form a smaller insertion opening, through which the hemming device 8 can be inserted into the central insertion opening 62. The four movable pressure plates 64 are used to assist in pressing the fabric 1 downwards. This pressing is typically achieved using the elasticity of the movable pressure plates 64 themselves. Each movable pressure plate 64 can be adjusted along the X or Y direction, allowing the position of each movable pressure plate 64 to be adjusted according to the size of the bag opening 11, thus better meeting the opening requirements of bag openings 11 of different sizes. In implementation, as... Figure 15 As shown, the lower pressure plate 61 has a threaded hole 63, and the movable pressure plate 64 has a slotted hole 65 along the X or Y direction. The fastener 66 that fits the threaded hole 63 passes through the slotted hole 65 and is threaded into the threaded hole 63. This not only fixes the movable pressure plate 64 to the lower pressure plate 61, but also makes it easy to adjust the position of the movable pressure plate 64.

[0092] Example 3

[0093] This embodiment provides a bag-opening device, including the aforementioned folding and pressing frame device 2, and also a frame 7 and a folding device 8 connected to the frame 7. The frame 7 primarily serves a load-bearing function, and is equipped with a worktable 71 for bag-opening operations. Figure 21 As shown, for ease of description, in this embodiment, the height direction of the frame 7 is taken as the Z direction, the length direction of the worktable 71 is taken as the X direction, and the width direction of the worktable 71 is taken as the Y direction. The X, Y, and Z directions are perpendicular to each other, as shown below. Figure 21 As shown, these directions are consistent with the directions in the folding and pressing frame device 2.

[0094] In this embodiment, the folding and pressing device 2 is disposed above the worktable 71, such as... Figure 21 As shown, the folding and pressing device 2 is configured to be movable in both the X and Y directions. For example, the bag-opening device also includes a connecting frame 72, an X-direction power source 73, and a Y-direction power source 75. The connecting frame 72 is movably connected to the frame 7 via a linear guide rail 25, forming a sliding pair in the X direction with the frame 7. The X-direction power source 73 is located on the frame 7 and is connected to the connecting frame 72 for driving the connecting frame 72 to move in the X direction. In implementation, the X-direction power source 73 can preferably be a stepper motor or a servo motor. The X-direction power source 73 can preferably be connected to the connecting frame 72 via an X-direction transmission mechanism 74, such as a screw-nut transmission mechanism, a belt transmission mechanism 91, or a gear-rack transmission mechanism. Figures 19-21As shown, this is to drive the hemming and pressing device 2 to move strictly along the X direction. The movable frame 21 can also be connected to the connecting frame 72 via a linear guide rail 25, forming a sliding pair along the Y direction with the connecting frame 72. The Y-direction power 75 can be set on the connecting frame 72 and driven by the movable frame 21 to drive the movable frame 21 to move along the Y direction. In implementation, the Y-direction power 75 can preferably be a stepper motor or a servo motor. The Y-direction power 75 can preferably be driven by the movable frame 21 via a Y-direction transmission mechanism 76 such as a screw-nut transmission mechanism, a belt transmission mechanism 91, and a gear-rack transmission mechanism, so as to drive the hemming and pressing device 2 to move strictly along the Y direction. This not only gives the hemming and pressing device 2 the freedom to move along the X and Y directions, but also allows the hemming requirements of bag openings 11 of different widths and lengths to be met through the cooperation of the hemming forming module 24 and the hemming structure 83.

[0095] In a further implementation, such as Figure 19 and Figure 20 As shown, the connecting frame 72 may further include a first frame 721 and a second frame 722. The first frame 721 can be connected to the frame 7 via a linear guide rail 25 arranged along the X direction and is driven by the X-direction power 73. The second frame 722 can be connected to the first frame 721 via a linear guide rail 25 arranged along the Z direction. The second frame 722 is driven by the Z-direction power 77 via a screw-nut transmission mechanism, a belt transmission mechanism 91, and a gear-rack transmission mechanism, etc., so that the Z-direction power 77 can drive the movable frame 21 to move up and down along the Z direction. In implementation, the Z-direction power 77 can be a motor, a cylinder, or a hydraulic cylinder. The movable frame 21 can be connected to the second frame 722 via a linear guide rail 25 arranged along the Y direction and is driven by the Y-direction power 75, so that the folding and pressing frame device 2 has the freedom of movement along the X, Y, and Z directions, which can meet the needs of more occasions.

[0096] The folding device 8 is connected to the frame 7 so that the frame 7 can support the folding device 8, and it is located above the worktable 71, such as... Figure 21 As shown, specifically, the folding device 8 may include a support 81 and a folding mold 82. The support 81 is connected to the frame 7, and the folding mold 82 is connected to the support 81. Folding structures 83 are respectively provided on both sides of the folding mold 82 along the X direction and on both sides of the folding mold 82 along the Y direction. The folding structures 83 are adapted to the folding forming module 24 so as to cooperate with the folding forming module 24 to complete the folding work. In implementation, the folding structure 83 is hook-shaped, such as... Figure 17 and Figure 18As shown, this is to form a folded edge with the corresponding folding edge forming module 24. In implementation, the folding edge structure 83 may include a positioning surface 831 and a hook portion 832 protruding from the positioning surface 831. The hook portion 832 is configured with a limiting surface 833 for restricting the bag edge piece 14, so that the positioning surface 831 and the limiting surface 833 can form a hook shape, such as... Figure 17 and Figure 18 As shown. In implementation, the folding mold 82 can have various embodiments. For example, the folding mold 82 may include four L-shaped folding plates. The two inner surfaces of the L-shaped folding plates are a positioning surface 831 and a limiting surface 833, respectively, so as to form a hook-shaped folding structure 83 using the positioning surface 831 and the limiting surface 833. The four folding plates are respectively fixedly installed on the bracket 81 and form a rectangle, and the four folding plates face four directions so as to cooperate with the corresponding folding forming module 24. Alternatively, the folding mold 82 can be an integral structure, with a groove formed on the side of the lower end of the folding mold 82, such as... Figure 17 and Figure 18 As shown, this allows the folding structure 83 to be formed in four directions of the folding mold 82, and it can also cooperate with the corresponding folding forming module 24.

[0097] In this embodiment, the folding device 8 and / or the folding frame device 2 are configured to be movable up and down in the Z direction. This allows the folding device 8 and the folding frame device 2 to move relative to each other in the Z direction, enabling the folding mold 82 to be inserted into the folding frame device 2 to form a folded fit with the folding forming module 24, or to be removed from the folding forming module 24 after folding. Therefore, in practice, the folding frame device 2 can be configured to be movable up and down in the Z direction, the folding device 8 can be configured to be movable up and down in the Z direction, or both can be configured to be movable up and down in the Z direction simultaneously. As an example, in this embodiment, the folding device 8 is also configured to be movable up and down in the Z direction. Specifically, the bag opening device also includes a lifting power 84, such as... Figure 17 and Figure 21 As shown, the bracket 81 is connected to the frame 7 via a linear guide rail 25 arranged along the Z direction, so as to have the freedom to move along the Z direction. The lifting power 84 is connected to the bracket 81 via a lifting transmission mechanism 85 such as a screw-nut transmission mechanism, a belt transmission mechanism 91 and a gear-rack transmission mechanism, so as to drive the folding mold 82 to move up and down along the Z direction using the lifting power 84.

[0098] In a more complete solution, this bag-opening device also includes a laser cutting module and a sewing module. The laser cutting module is installed on the frame 7 and is used to cut the fabric 1 to form a seam within the bag opening area 12. The two ends of the seam can be Y-shaped, such as... Figure 2As shown, the sewing module is used for sewing. In a more complete solution, this bag-opening device also includes a control module, with each of the aforementioned power sources electrically connected to the control module for precise control. Specifically, the X-axis adjustment power 221, Y-axis adjustment power 231, pull-out power 33, upward pressure power 35, downward pressure power 67, X-axis power 73, Y-axis power 75, Z-axis power 77, and lifting power 84 can all be electrically connected to the control module for unified control.

[0099] In implementation, by configuring the hemming and pressing frame device 2 to be movable along the X direction, on the one hand, the position of the entire hemming and pressing frame device 2 can be adjusted along the X direction, so that the hemming and pressing frame device 2 can cooperate with the laser cutting module and sewing module on the frame 7; on the other hand, the distance between the hemming forming module 24 in the X-direction hemming unit 22 and the corresponding side hemming structure 83 can be adjusted, so that the hemming structure 83 on one side can form a hemming cooperation with the hemming forming module 24 on one side, thereby enabling the hemming structure 83 to cooperate with the hemming forming module 24 in the X-direction hemming unit 22. The folding mechanism completes the folding work on both sides (wide side 16) of the bag opening 11 of different lengths, solving the problem of being suitable for bag openings 11 of different lengths. By configuring the folding frame device 2 to be movable along the Y direction, the folding forming module 24 in the Y-direction folding unit 23 has the freedom to move relative to the folding mold 82 along the Y direction. Thus, the folding structure 83 and the folding forming module 24 in the Y-direction folding unit 23 can cooperate to complete the folding work on both sides (long side 15) of the bag opening 11 of different widths, solving the problem of being suitable for bag openings 11 of different widths.

[0100] The bag-opening process using the bag-opening equipment provided in this embodiment may include: an automatic adjustment process, a cutting process, a wide-side folding process, and a long-side folding process, wherein...

[0101] The automatic adjustment process includes: adjusting the first spacing between the two folding forming modules 24 in the X-direction folding unit 22 of the folding and pressing device 2 according to the required length of the bag opening 11, such as... Figure 22 As shown, the first spacing is adapted to the length of the bag opening 11; simultaneously, the second spacing between the two folding forming modules 24 in the Y-direction folding unit 23 of the folding and pressing frame device 2 is adjusted according to the required length of the bag opening 11, so that the second spacing is adapted to the width of the bag opening 11, as shown. Figure 22 As shown.

[0102] The cutting process includes: laying the fabric 1 (or cloth) flat on the hemming and pressing frame device 2, and pressing the fabric 1 downwards using the pressing mechanism 6. The planned pocket opening area 12 on the fabric 1 is located within the central insertion opening 62. The hemming forming module 24 is moved along the X direction to the position adapted to the laser cutting module, and the laser cutting module is used to cut the required seam shape on the fabric 1 (it can be understood that if the hemming forming module 24 is initially positioned exactly to be adapted to the laser cutting module, this step is not necessary). Figure 2 As shown.

[0103] The wide-edge folding process includes: S1, moving the folding forming module 24 along the X direction to the position of the adapting folding device 8, so that the lower end of the folding device 8 is directly opposite the lower bag opening area 12, such as... Figure 1 As shown; the driving folding device 8 moves downward relative to the folding forming module 24 along the Z direction, so that the lower end of the folding mold 82 is inserted into the pocket opening area 12 of the fabric 1, and the limiting surface 833 of the folding structure 83 is located below the fabric 1, as shown. Figure 23 As shown, there is at least a gap between the limiting surface 833 and the lower surface of the fabric 1 that can accommodate the bag edge piece 14 and the pull-out member 34. This gap can be equal to the sum of the thickness of the fabric 1 and the thickness of the pull-out member 34, and preferably is greater than the sum of the thickness of the fabric 1 and the thickness of the pull-out member 34. The positioning surface 831 of the folding structure 83 corresponds to the fabric 1.

[0104] S2. Based on the length of the bag opening 11, the X-direction power 73 drives the folding and pressing frame device 2 to move along the X direction, causing the folding forming module 24 on one side of the X-direction folding unit 22 to approach the folding structure 83 at one end of the folding device 8 and stop at a position that matches the folding structure 83; during this process, the corresponding bag edge piece 14 engages with the folding structure 83 and undergoes a certain degree of bending under the guidance of the folding structure 83, such as... Figure 24 As shown.

[0105] S3. Using the pulling force 33 in the side folding forming module 24, the pulling component 34 is driven to move towards the folding device 8 to position one, and the bag edge piece 14 is pressed into the folding structure 83, so that the bag edge piece 14 is bent, as shown. Figure 25 As shown; in a preferred embodiment, at one position, the end of the pull-out member 34 abuts against the pocket edge piece 14 of the fabric 1 so as to press the pocket edge pieces 14 of different thicknesses against the positioning surface 831 of the folding device 8 so as to meet the folding requirements of different lengths and thicknesses.

[0106] S4, the driving folding device 8 moves upward in the Z direction relative to the folding forming module 24, such as Figure 26As shown, the folded pocket edge piece 14 is pressed against the lower surface of the pull-out component 34 using the limiting surface 833 of the folding device 8, in order to better meet the precise folding requirements of fabrics 1 of different thicknesses. It can be understood that, in practice, when the spacing in S1 is equal to or slightly less than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step can be omitted; when the spacing in S1 is greater than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step not only achieves a better folding effect but is also applicable to fabrics 1 of different thicknesses. It can be understood that, to meet the folding requirements of fabrics 1 of different thicknesses and improve the folding effect, in practice, the spacing can be preferentially controlled to be greater than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, and then this step can be used to press the pocket edge pieces 14 of different thicknesses, which is very convenient and efficient.

[0107] S5. The pressing force 35 in the folding forming module 24 drives the pressing component 36 to move upward, such as... Figure 27 As shown, this is done to press and tighten the bent bag edge piece 14 to fix the bag edge piece 14 and maintain the folded edge effect for subsequent sewing.

[0108] S6. Using the pulling force 33 in the folding forming module 24, the pulling component 34 is driven to move to position two in the direction away from the folding device 8, so that the pulling component 34 exits the folding structure 83, as shown. Figure 28 As shown, the distance that the pull-out component 34 can retract can be determined according to actual needs, as long as it does not affect the subsequent sewing at the bag opening 11. For example, the pull-out component 34 can be moved to a position flush with the end of the upper pressing component 36, thereby completing the folding work of the wide edge 16 on one side of the bag opening 11.

[0109] S7. If S4 exists, the driving folding device 8 moves downwards in the Z direction relative to the folding forming module 24, as shown. Figure 29 As shown, to detach from the pocket edge piece 14, preferably move to the position of S1, such that the distance between the limiting surface 833 and the lower surface of the fabric 1 is equal to the distance in S1; if S4 does not exist, this step can also be omitted;

[0110] S8. Based on the length of the bag opening 11, the folding and pressing frame device 2 is driven to move in the opposite direction along the X direction using the X-direction power 73, such as... Figure 30 As shown, the folding forming module 24 on the other side of the X-direction folding unit 22 is brought close to the folding structure 83 at the other end of the folding device 8 and stops at the position that matches the folding structure 83. Then, repeating S3-S6 above completes the folding work on the other side of the bag opening 11's wide edge 16. Figure 31 As shown.

[0111] The long side folding process can be the same as the wide side folding process, only the folding direction is different. Specifically, the long side folding process includes: P1, using X-direction power 73 to drive the folding frame device 2 to move along the X direction, so that the folding device 8 returns to the position in the middle of the corresponding bag opening area 12; then, according to the width of the bag opening 11, using Y-direction power 75 to drive the folding frame device 2 to move along the Y direction, so that the folding forming module 24 on the Y-direction folding unit 23 side approaches the folding structure 83 on the folding device 8 side and stops at the position that matches the folding structure 83; during this process, the bag edge piece 14 on the corresponding side is inserted into the folding structure 83 and undergoes a certain degree of bending under the guidance of the folding structure 83.

[0112] P2. The pull-out force 33 in the side folding forming module 24 drives the pull-out component 34 to move towards the folding device 8 to position one, and presses the bag edge piece 14 into the folding structure 83, so that the bag edge piece 14 forms a bend; in a preferred embodiment, at position one, the end of the pull-out component 34 abuts against the bag edge piece 14 of the fabric 1, so as to press the bag edge pieces 14 of different thicknesses tightly against the positioning surface 831 of the folding device 8, so as to meet the folding requirements of different lengths and different thicknesses in this way.

[0113] P3. The driving folding device 8 moves upward along the Z direction relative to the folding forming module 24. The limiting surface 833 of the folding device 8 presses the bent pocket edge piece 14 against the lower surface of the pull-out component 34 to better meet the precise folding requirements of fabrics 1 of different thicknesses. It can be understood that, in practice, when the spacing in S1 is equal to or slightly less than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step can be omitted; when the spacing in S1 is greater than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step not only achieves a better folding effect but is also applicable to fabrics 1 of different thicknesses. It can be understood that, to meet the folding requirements of fabrics 1 of different thicknesses and improve the folding effect, in practice, the spacing can be preferentially controlled to be greater than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, and then this step can be used to press the pocket edge pieces 14 of different thicknesses, which is very convenient and efficient.

[0114] P4. The pressing force 35 in the folding forming module 24 drives the pressing component 36 to move upward, so as to press the bent bag edge piece 14 to fix the bag edge piece 14 and maintain the folding effect for subsequent sewing.

[0115] P5. Using the pulling force 33 in the hem forming module 24, the pulling component 34 is driven to move to position two in the direction away from the hem forming device 8, so that the pulling component 34 exits the hem forming structure 83. The distance at which the pulling component 34 exits can be determined according to actual needs, as long as it does not affect the subsequent sewing at the bag opening 11. For example, the pulling component 34 can be moved to a position flush with the end of the upper pressing component 36, thereby completing the hem forming work of the long side 15 on one side of the bag opening 11.

[0116] P6. If P3 exists, the driving folding device 8 moves downward in the Z direction relative to the folding forming module 24. Similarly, it is preferred to move to the position of S1, so that the distance between the limiting surface 833 and the lower surface of the fabric 1 is equal to the distance in S1. If P3 does not exist, this step can also be omitted.

[0117] P7. Based on the width of the bag opening 11, the Y-direction power 75 drives the folding and pressing frame device 2 to move in the opposite direction along the Y direction, causing the folding forming module 24 on the other side of the Y-direction folding unit 23 to approach the folding structure 83 on the other side of the folding device 8 and stop at the position that matches the folding structure 83. Then, repeat the above steps P2-P5 to complete the folding work on the other long side 15 of the bag opening 11. Finally, the folding mold 82 is removed from the folding and pressing frame device 2.

[0118] It is understandable that, during implementation, the order of the automatic adjustment process and the cutting process can be determined according to actual needs. At the same time, the order of the wide side folding process and the long side folding process can also be determined according to actual needs.

[0119] Example 4

[0120] To address the issue of achieving better folding results for bag openings 11 of different sizes, the main difference between this embodiment 4 and the previous embodiments is that the folding device 8 in the bag opening equipment provided in this embodiment further includes a telescopic power 9, such as... Figure 32 and Figure 37As shown, the folding mold 82 is configured to extend and retract along the X direction. The extension and retraction power 9 is connected to the folding mold 82 so that the extension and retraction power 9 can adjust the length of the folding mold 82 by driving the extension and retraction of the folding mold 82 along the X direction. On the one hand, this allows the length of the folding mold 82 to be adapted to bag openings 11 of different lengths, so that the folding structures 83 on both sides of the folding mold 82 along the Y direction can form a better folding fit with the folding forming module 24 in the X-direction folding unit 22. This not only meets the folding requirements of the two wide sides 16 of bag openings 11 of different sizes, but also simplifies the folding process and ensures the folding effect. On the other hand, this allows the length of the folding structures 83 on both sides of the folding mold 82 along the X direction to be adapted to bag openings 11 of different lengths, so that the folding structures 83 on both sides of the folding mold 82 along the X direction can form a better folding fit with the folding forming module 24 in the Y-direction folding unit 23. This not only meets the folding requirements of the two long sides 15 of bag openings 11 of different sizes, but also simplifies the folding process and ensures the folding effect.

[0121] In implementation, the folding die 82 may include two end parts 92 and several intermediate parts 94. The two end parts 92 are arranged opposite to each other. The end parts 92 can form a sliding pair with the bracket 81 in the X direction through linear guide rails 25, etc. The end face and both sides of the end parts 92 are respectively constructed with the folding structure 83, such as... Figures 32-36 As shown, the folded edge structure 83 is respectively constructed on both sides of the intermediate component 94, as... Figure 35 As shown. An intermediate component 94 is movably disposed between two end components 92 along the X-direction. The intermediate component 94 has folded edge structures 83 on both sides. An elastic component 96 is disposed between at least two adjacent intermediate components 94, and the elastic component 96 has elastic force along the X-direction. The telescopic power unit 9 is driven to the end components 92 via a linkage mechanism, so that the power unit can drive the two end components 92 to move synchronously in opposite directions along the X-direction. The end components are driven to the intermediate components. In implementation, the end components 92 can be directly connected to the intermediate components 94 located at the ends, or the elastic component 96 can be disposed between the end components 92 and the intermediate components 94 located at the ends, such as... Figure 36As shown, the elastic component 96 is used to transmit force between the end component 92 and the intermediate component 94. In use, when the two end components 92 approach each other, the elastic potential energy of the elastic component 96 increases, and the intermediate components 94 automatically and evenly distribute themselves between the two end components 92. When the end components 92 move away from each other, the elastic potential energy of the elastic component 96 decreases, and the intermediate components 94 also automatically and evenly distribute themselves between the two end components 92. Thus, the elastic component 96 can drive the intermediate components 94 and the end components 92 to move synchronously. This design not only allows the length of the folding mold 82 and the side folding structure 83 to be adjusted by the telescopic force 9 to meet the folding requirements of the long side 15 in bag openings of different lengths 11, but also allows for a smaller gap between adjacent folding structures 83. The end components 92 can automatically and evenly distribute themselves between the two end components 92, thus facilitating a better folding effect through the combination of the folding structures 83.

[0122] In implementation, the linkage mechanism can employ existing gear-rack transmission mechanisms, screw-nut transmission mechanisms, or belt transmission mechanisms 91, etc. In implementation, the intermediate component 94 can be connected to the bracket 81 via a linear guide rail 25 to ensure linear movement of the intermediate component 94. The intermediate component 94 can also be connected to the bracket 81 via a guide shaft 93 engaging with a mating hole 95, or via a guide groove engaging with a slider. In the preferred embodiment provided in this example, as... Figures 32-36 As shown, the folding die 82 also includes a guide shaft 93, which is arranged along the X direction and fixed to one of the end components 92, such as... Figures 32-36 As shown, another end component 92 has a mating hole 95 adapted to the guide shaft 93, and the intermediate component 94 also has a mating hole 95 adapted to the guide shaft 93. The intermediate component 94 is movably sleeved on the guide shaft 93 through the mating hole 95, and the elastic component 96 can also be sleeved on the guide shaft 93, as shown. Figure 36 As shown, the elastic component 96 can preferably be a cylindrical helical compression spring, a conical helical spring, or a spiral helical spring. In implementation, such as... Figures 32-36 As shown, the linkage mechanism may include a rotating shaft 97 and a nut 973. The rotating shaft 97 includes an intermediate shaft section 971 and lead screw sections 972 connected to both ends of the intermediate shaft section 971. The threads of the two lead screw sections 972 have opposite directions. Each lead screw section 972 is threadedly connected to a nut 973. The two nuts 973 are respectively connected to two end components 92, as shown. Figure 32 and Figure 35As shown, the telescopic power unit 9 is connected to the intermediate shaft section 971 for driving the rotating shaft 97 to rotate. In implementation, the telescopic power unit 9 can preferably be a stepper motor or a servo motor. The telescopic power unit 9 is connected to the intermediate shaft section 971 through a belt drive mechanism 91, a gear drive mechanism, etc., to drive the rotating shaft 97 to rotate. This allows the telescopic power unit 9 to drive the rotating shaft 9787 to rotate forward and reverse, thereby causing the two end components 92 to move synchronously in opposite directions. In implementation, the telescopic power unit 9 can be electrically connected to a control module to achieve automatic control.

[0123] The bag-opening process using the bag-opening equipment provided in this embodiment may include: an automatic adjustment process, a cutting process, a wide-side folding process, and a long-side folding process, wherein...

[0124] The automatic adjustment process includes: adjusting the first spacing between the two folding forming modules 24 in the X-direction folding unit 22 of the folding and pressing frame device 2 according to the required length of the bag opening 11, so that the first spacing adapts to the length of the bag opening 11, such as... Figure 38 As shown; simultaneously, adjust the second spacing between the two folding forming modules 24 in the Y-direction folding unit 23 of the folding and pressing frame device 2 according to the required width of the bag opening 11, so that the second spacing adapts to the width of the bag opening 11; adjust the length of the folding mold 82 in the folding device 8 according to the required length of the bag opening 11, so that the length of the folding mold 82 is less than the length of the bag opening 11, so that the folding mold 82 can be inserted, as shown. Figure 38 As shown.

[0125] The cutting process includes: laying the fabric 1 (or cloth) flat on the hemming and pressing frame device 2, and pressing the fabric 1 down using the pressing mechanism 6. The pocket opening area 12 planned on the fabric 1 is located within the central insertion opening 62, such as... Figure 38 As shown. The hem forming module 24 is then moved along the X direction to the position of the laser cutting module, and the laser cutting module cuts out the desired seam shape on the fabric 1 (this step is unnecessary if the hem forming module 24 is initially positioned to match the laser cutting module). Figure 38 As shown.

[0126] The wide-edge folding process includes: S1, moving the folding frame device 2 along the X direction to the position of the matching folding device 8, so that the lower end of the folding mold 82 is directly facing the bag opening area 12 below, such as... Figure 38 As shown; the driving folding device 8 moves downward relative to the folding frame device 2 along the Z direction, so that the lower end of the folding mold 82 is inserted into the bag opening area 12 of the fabric 1 along the center position of the bag opening area 12, and the limiting surface 833 of the folding structure 83 is located below the fabric 1, as shown. Figure 39As shown, the limiting surface 833 and the lower surface of the fabric 1 have at least a gap that can accommodate the bag edge piece 14 and the pull-out component 34. This gap can be equal to the sum of the thickness of the fabric 1 and the thickness of the pull-out component 34, and preferably is greater than the sum of the thickness of the fabric 1 and the thickness of the pull-out component 34. Meanwhile, the positioning surface 831 of the folding structure 83 corresponds to the fabric 1 and the pull-out component 34.

[0127] S2. Based on the length of the bag opening 11, the folding mold 82 is extended by the telescopic power 9, so that the length of the folding mold 82 is adapted to the length of the bag opening 11. Figure 40 As shown, for example, the distance between the positioning surfaces 831 on the end faces of the two end components 92 in the hemming mold 82 can be equal to or less than (slightly less than) the length of the bag opening 11. This allows for better coordination with the X-direction hemming unit 22 and is applicable to fabrics 1 of different thicknesses. During this process, the two bag edge pieces 14 in the width direction of the bag opening 11 are respectively engaged with the corresponding hemming structure 83 and bend to a certain extent under the guidance of the hemming structure 83, such as... Figure 40 As shown, this allows the pull-out component 34 to correspond to the bent bag edge piece 14.

[0128] S3. Using the pulling force 33 in the X-direction folding unit 22, the pulling component 34 is driven to move towards position one in the direction of the folding device 8, and the bag edge piece 14 is pressed into the folding structure 83, so that the bag edge piece 14 is bent, as shown. Figure 41 As shown; in a preferred embodiment, at one location, the end of the pull-out member 34 abuts against the bag edge piece 14.

[0129] S4. The folding device 8 moves upward in the Z direction relative to the folding forming module 24, and the limiting surface 833 of the folding device 8 presses the bent bag edge piece 14 against the lower surface of the pull-out component 34. Figure 42 As shown, this is to better meet the precise hemming requirements of fabrics 1 with different thicknesses. In practice, when the spacing in S1 is equal to or slightly less than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step can be omitted; when the spacing in S1 is greater than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step not only achieves a better hemming effect but is also applicable to fabrics 1 with different thicknesses. It can be understood that, to meet the hemming requirements of fabrics 1 with different thicknesses and improve the hemming effect, in practice, the spacing can be preferentially controlled to be greater than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34.

[0130] S5. The pressing force 35 in the X-direction folding unit 22 drives the pressing component 36 to rotate upward, such as... Figure 43 As shown, the principle of lever is used to press the bent bag edge piece 14 tightly.

[0131] S6. Using the pulling force 33 in the X-direction folding unit 22, the pulling component 34 is driven to move to position two in the direction away from the folding device 8, so that the pulling component 34 exits the folding structure 83, as shown. Figure 44 As shown, this completes the folding of the two wide sides 16 in the bag opening 11.

[0132] The long side folding process can be the same as in Embodiment 3. The folding frame device 2 and the folding device 8 are driven to move relative to each other in the Y direction. By changing the relative positions of the folding frame device 2 and the folding device 8 in the Y direction, the folding forming module 24 in the Y-direction folding unit 23 successively forms a folding engagement with the folding structure 83 on the corresponding side of the folding mold 82, thereby completing the folding work of the two long sides 15 of the bag opening 11 in sequence. Specifically, the long side folding process includes: P1. If S4 exists, the folding device 8 can be driven to move downward relative to the folding frame device 2 in the Z direction to disengage from the bag edge piece 14. In practice, it can be moved down to the position of S1 or other positions; if S4 does not exist, there is no need to adjust the height position of the folding device 8. Then, based on the width of the bag opening 11, the Y-direction power 75 drives the folding and pressing frame device 2 to move along the Y direction, so that the folding forming module 24 on the Y-direction folding unit 23 side approaches the folding structure 83 on the folding device 8 side and stops at the position that matches the folding structure 83; during this process, the bag edge piece 14 on the corresponding side is inserted into the folding structure 83 and bends to a certain extent under the guidance of the folding structure 83.

[0133] P2. Using the pulling force 33 in the side folding forming module 24, the pulling component 34 is driven to move towards the folding device 8 to position one, and the bag edge piece 14 is pressed into the folding structure 83, so that the bag edge piece 14 is bent.

[0134] P3. The driving folding device 8 moves upward in the Z direction relative to the folding and pressing frame device 2. The limiting surface 833 of the folding device 8 presses the bent pocket edge piece 14 against the lower surface of the pull-out component 34 to better meet the needs of precise folding of fabrics 1 with different thicknesses. It can be understood that, in practice, when the distance between the limiting surface 833 in P1 and the lower surface of the fabric 1 is equal to or slightly less than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step can be omitted; when the distance between the limiting surface 833 in P1 and the lower surface of the fabric 1 is greater than the sum of the thickness of the pocket edge piece 14 and the thickness of the pull-out component 34, this step can not only achieve a better folding effect, but is also applicable to fabrics 1 with different thicknesses. It is understandable that, in order to meet the folding requirements of fabrics 1 of different thicknesses and improve the folding effect, in practice, the spacing can be controlled to be greater than the sum of the thickness of the bag edge piece 14 and the thickness of the pull-out component 34. Then, this step can be used to press the bag edge pieces 14 of different thicknesses, which is very convenient and efficient.

[0135] P4. Using the pressing force 35 in the folding forming module 24, the pressing component 36 is driven to move upward to press the bent bag edge piece 14.

[0136] P5. Using the pull-out power 33 in the folding forming module 24, the pull-out component 34 is driven to move to position two in the direction away from the folding mold 82, so that the pull-out component 34 exits the folding structure 83, thereby completing the folding work of the long side 15 on one side of the bag opening 11.

[0137] P6. If P3 exists, the folding device 8 is driven to move downward in the Z direction relative to the folding forming module 24 to disengage from the bag edge piece 14. It is preferably moved to the position of P1, so that the distance between the limiting surface 833 and the lower surface of the fabric 1 is equal to the distance in S1. Of course, in practice, the folding device 8 can also be moved to other positions. If P3 does not exist, this step can also be omitted.

[0138] P7. Based on the width of the bag opening 11, the Y-direction power 75 drives the folding and pressing frame device 2 to move in the opposite direction along the Y direction, so that the folding forming module 24 on the other side of the Y-direction folding unit 23 approaches the folding structure 83 on the other side of the folding device 8 and stops at the position that matches the folding structure 83. Then, repeat the above P2-P5 to complete the folding work of the other long side 15 of the bag opening 11.

[0139] Finally, the folding mold 82 is shortened by the telescopic force 9, so that the length of the folding mold 82 is less than the length of the bag opening 11, as shown. Figure 45 As shown, this allows the folding die 82 to smoothly exit the folding frame device 2.

[0140] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A folding and pressing frame device suitable for bag opening equipment, characterized in that, It includes a movable frame, an X-axis folding unit, and a Y-axis folding unit, among which, The X-direction folding unit is installed on the movable frame. The X-direction folding unit includes an X-direction adjustment module and two folding forming modules adapted to the folding structure. The two folding forming modules are arranged opposite to each other along the X direction. The X-direction adjustment module is connected to the folding forming modules in a transmission manner. The distance between the two folding forming modules along the X direction is adjusted by the X-direction adjustment module. The Y-direction folding unit is installed on the movable frame. The Y-direction folding unit includes a Y-direction adjustment module and two folding forming modules adapted to the folding structure. The two folding forming modules are arranged opposite to each other along the Y direction. The Y-direction adjustment module is connected to the folding forming modules in a transmission manner. The distance between the two folding forming modules along the Y direction is adjusted by the Y-direction adjustment module. Four folded edge modules together form a central window that adapts to bag openings of different sizes; The folding forming module includes a base, a pull-out mechanism, and an upper pressing mechanism, wherein... The pressing mechanism includes a pressing component and a pressing power source connected to the base. The pressing power source is driven by the pressing component. The pull-out mechanism includes a pull-out component and a pull-out power source connected to the base. The pull-out power source is connected to the pull-out component via a transmission mechanism. The pull-out component is positioned above the upper pressing component and is used to adapt to the folding device. The pulling force is used to drive the pulling component to move to position one in the direction of the other set of folding forming modules corresponding to it, and press the bag edge piece on the corresponding side onto the folding device, so that the bag edge piece is bent. The pressing force is used to drive the pressing component to press the bent bag edge piece tightly. The pulling force is also used to drive the pulling component to move to position two in the direction away from the other set of folding forming modules corresponding to it, so that the pulling component exits the folding device.

2. The folding and pressing frame device for bag opening equipment according to claim 1, characterized in that, The X-axis adjustment module includes an X-axis adjustment power and an X-axis moving mechanism. The X-axis adjustment power is connected to the X-axis moving mechanism, and the X-axis moving mechanism is connected to the folding forming module. The X-axis adjustment power drives the two folding forming modules to move synchronously in opposite directions along the X-axis.

3. The folding and pressing frame device for bag opening equipment according to claim 2, characterized in that, The X-direction moving mechanism includes a synchronous gear and two symmetrically arranged transmission components. The two transmission components are respectively movable along the X direction and are mounted on the movable frame. The two folding forming modules in the X-direction folding unit are respectively connected to the two transmission components. The two transmission components are respectively constructed with racks adapted to the synchronous gear. The racks of the two transmission components mesh with the synchronous gear. The X-direction adjusting power is set in the movable frame and is connected to the synchronous gear. The X-direction adjusting power drives the two transmission components to move synchronously in opposite directions along the X direction.

4. The folding and pressing frame device for bag opening equipment according to claim 1, characterized in that, The Y-axis adjustment module includes a Y-axis adjustment power and a Y-axis moving mechanism. The Y-axis adjustment power is connected to the Y-axis moving mechanism, and the Y-axis moving mechanism is connected to the folding forming module. The two folding forming modules are driven to move synchronously in opposite directions along the Y direction by the Y-axis adjustment power.

5. The folding and pressing frame device for bag opening equipment according to claim 4, characterized in that, The Y-direction folding unit includes a Y-direction adjustment module, which includes two Y-direction moving mechanisms. The two Y-direction moving mechanisms are arranged parallel to each other along the Y direction and are respectively arranged on both sides of the folding forming module. The two ends of the two folding forming modules in the Y-direction folding unit are respectively connected to the two Y-direction moving mechanisms, and the two folding forming modules are driven to move synchronously in opposite directions through the Y-direction moving mechanisms.

6. The folding and pressing frame device for bag opening equipment according to claim 5, characterized in that, Both Y-axis moving mechanisms use belt drive mechanisms, which include a driving pulley, a driven pulley, and a drive belt. The two driving pulleys are connected to the drive shaft, and the Y-axis adjusting power is connected to the drive shaft. The two driven pulleys are rotatably mounted on the movable frame. The drive belt is tensioned between the driving pulley and the driven pulley. One end of the folding edge forming module is connected to the upper side of the two drive belts, and the other end of the folding edge forming module is connected to the lower side of the two drive belts.

7. The folding and pressing frame device for bag opening equipment according to claim 1, characterized in that, In the X-direction folding unit, the base of the folding forming module is connected to the X-direction adjustment module. The pull-out component in the folding forming module is movably mounted on the base along the X direction. The pull-out power is a cylinder, with one end connected to the base and the other end connected to the pull-out component. The cylinder extends and retracts along the X direction. The pressing component is hinged to the base. The pressing power is a cylinder, with one end connected to the base and the other end connected to one end of the pressing component. The cylinder extends and retracts along the Z direction to drive the pressing component to rotate.

8. The folding and pressing frame device for bag opening equipment according to claim 1, characterized in that, In the Y-direction folding unit, the base of the folding forming module is connected to the Y-direction adjustment module. The pull-out component in the folding forming module is movably mounted on the base along the Y direction. The pull-out power is a cylinder, with one end connected to the base and the other end connected to the pull-out component. The cylinder extends and retracts along the Y direction. The pressing power is a cylinder, with one end connected to the base and the other end connected to the pressing component. The cylinder extends and retracts along the Z direction to drive the pressing component to rise and fall along the Z direction.

9. A bag-opening device, characterized in that, It includes a frame, a folding device connected to the frame, and a folding and pressing frame device as described in any one of claims 1-8, wherein, The frame is equipped with a workbench; The folding and pressing device is located above the workbench and is configured to move along the X and Y directions. The folding device includes a folding mold, and the folding mold has folding structures on both sides along the X direction and folding structures on both sides along the Y direction. The folding structures are adapted to the folding forming module. The folding mold and / or folding frame device are configured to be able to move up and down in the Z direction.

10. The bag-opening device according to claim 9, characterized in that, The folding device also includes a telescopic power source. The folding mold is configured to extend and retract along the X direction. The telescopic power source is connected to the folding mold via a transmission. The telescopic power source adjusts the length of the folding mold by driving the folding mold to extend and retract along the X direction.

11. The bag-opening device according to claim 10, characterized in that, The folding mold includes a support, two end components and several intermediate components, wherein the support is connected to the frame; Two end components are arranged opposite each other, and the end components and the bracket form a sliding pair along the X direction. The end face and both sides of the end components are respectively constructed with the folded edge structure. An intermediate component is movable along the X-direction and positioned between two end components. The intermediate component has folded edge structures on both sides. An elastic component with elastic force is provided between at least two adjacent intermediate components. The telescopic power is connected to the end components through a linkage mechanism. The power component is used to drive the two end components to move synchronously in opposite directions along the X direction. When the two end components approach each other, the elastic potential energy of the elastic component increases. When the end components move away from each other, the elastic potential energy of the elastic component decreases. The elastic component drives the middle component to move synchronously with the end components. The folded edge structure includes a positioning surface and a hook protruding from the positioning surface. The hook is constructed with a limiting surface for restricting the edge piece of the bag, and the positioning surface and the limiting surface form a hook shape.

12. A bag-opening process, characterized in that, The bag opening device according to any one of claims 10-11 includes: an automatic adjustment process, a cutting process, and a wide-edge folding process, wherein the automatic adjustment process includes: adjusting the spacing between two folding modules in the X-direction folding unit according to the required bag opening length, so that the spacing between the two folding modules is adapted to the length of the bag opening; adjusting the spacing between two folding modules in the Y-direction folding unit according to the required bag opening width, so that the spacing between the two folding modules is adapted to the width of the bag opening; and adjusting the length of the folding mold in the folding device according to the required bag opening length, so that the length of the folding mold is less than the length of the bag opening. The cutting process includes: constraining the fabric to the hemming frame device and cutting seams of the desired shape on the fabric; The wide-edge folding process includes: driving the folding device and the folding forming module to move relative to each other along the Z direction, so that the lower end of the folding mold is inserted into the fabric, the positioning surface of the folding structure corresponds to the fabric, and the limiting surface of the folding structure is located below the fabric. Based on the length of the bag opening, the folding mold is extended by telescopic power so that the length of the folding mold matches the length of the bag opening, and the folding structure is used to bend the corresponding side of the bag edge during the extension process. The pull-out force in the X-direction folding unit drives the pull-out component to move towards the folding device to position one, pressing the bag edge piece into the folding structure, thus forming a bend in the bag edge piece. The pressing force in the X-direction folding unit drives the pressing component to press the bent bag edge piece tightly. The pull-out force in the X-direction folding unit drives the pull-out component to move towards position two in the direction away from the folding device, thus removing the pull-out component from the folding structure and completing the folding work on the two wide sides of the bag opening.

13. The bag-opening process according to claim 12, characterized in that, It also includes a long side folding process, which involves adjusting the relative position of the folding frame device and the folding device along the Y direction so that the folding forming module in the Y-direction folding unit successively forms a folding engagement with the folding structure on the corresponding side of the folding mold, thereby completing the folding work of the two long sides of the bag opening in sequence. And / or, the wide edge folding process further includes: driving the folding device to move upward in the Z direction relative to the folding and pressing frame device, and using the limiting surface of the folding device to press the bent bag edge piece against the lower surface of the pull-out component.

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